| ISI | infarct size index; initial slope index; injury severity index; Institute for Scientific Information... |
|---|---|
| RI | radiation intensity; radioactive isotope; radioimmunology; recession index; recombinant inbred [stra... |
| SI | International System of Units [Fr. le Systeme International d'Unites]; sacroiliac; saline infusion; ... |
| ECG | Electro-Cardio-Graphy(-Gram); 심전도 = EKG 1. Conducting System Structu... |
| AI | accidental injury; accidentally incurred; adiposity index; aggregation index; allergy and immunology... |